/in/foo.cc: In function 'int main()':
/in/foo.cc:18:21: error: 'pow' was not declared in this scope
   healed += pow(2, i);
                     ^
/in/foo.cc:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int i = 0; i < medicine.size(); i++) {
                    ~~^~~~~~~~~~~~~~~~~
/in/foo.cc:37:8: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
     if ((state | medicine[i]) != state)
        ^